How do I find the problem and fix it? a bad rear window defroster.
I checked all the fuses and circuit breakers first.they were good.I switched the circuit breaker with the one next to it, it had same numbers. I then used test lamp at rear window. (several combos with test light)Nothing.
Light comes on when I push the button, and it goes off after 10 mins. (like owners man. says)What can I try now?
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It is located in the SJB smart junction box , it's a fuse / relay center / microprocessor ! Fuse # F2.10 30 amp . location -behind left side dash panel . Also check the accessory relay . Top relay left side , same location SJB .
Visual Inspection Chart
what is failing here.?
HVAC , not blowing? (damper issues)
give full symptoms there, good and bad.
there are hvac fuses blower, and other things.(dampers?)
window motor circuit breakers.
best is symptoms work from that....
not all have fuses, some are circuit breakers that auto reset.
You also have Circuit Breakers for your windows, Or your Master Switch ,You can Test the Driver Control Switch or the rear switches by removing the Switches and using the connector Plug and a Jump wire try jumping accross the wires,if they go up or down you could have a Bad Switch,if nothing moves more than likely your Window Motor is bad. BUT first CHECK your Circuit Breakers ,It could be Labeled as accessery Relay or circuit Breaker.
easy fix is sometimes the "circuit breaker" in the inside fuse panel, on GM products they are likely silver colored and pull out and plug in just like a fuse. Some car makers have the diagram inside the fuse cover which makes it convenient to see which fuse or breaker applies to the defogger. you can switch identical cir.brkr.s with each other to see if then it operates. then get a new one from your parts store. I switch the power seat relay with the rear defrogger relay and this confirms my check before spending any money. good luck keith
Power window usually don't have a fuse but an automatically resetting breaker. If all four windows stopped working at the same time check the body control module that is what manages the power windows. Good luck.
It could be a bad rear defroster control switch or relay, it could be a loose or damaged connector somewhere in the defroster circuit, or it could be a damaged or defective defroster grid on your rear window. The easiest way to check to see if you have a circuit problem or a grid problem is to check for voltage at the connectors to the defroster grid at the rear window area. These connectors may even be located inside the trunk just below the rear window. If there is power there, then the circuits are OK and the rear window will most likely have to be replaced to fix it. If there is no power there, then the circuits must be traced to locate the cause of the failure...Most likely a burned-up switch and/or connector.
If ALL the windows quit working, then it's either a bad circuit breaker or a short circuit. There are two fuse/relay/breaker panels: under the hood and under the back seat cushion. The power window circuit breaker is under the back seat cushion, near the battery.
Remove the back seat completely, then remove the fuse panel top and inner cover. The fuse diagram is inside the top cover. Circuit breaker # 57 is the one. Pull it out. Use your voltmeter/multi-tester to check for continuity through the breaker. If there's no continuity, the breaker is bad and needs to be replaced. If it's good, then you have a dead short somewhere that causes the self-resetting breaker to uncouple when you attempt to operate a window. If so, the short will need to be traced down and repaired. Good luck.